254 University Geological Survey of Kansas. 
We do not regard this analysis as having any particular 
value, but it is the only one of an Oregon natural gas of which 
we have any knowledge. 
UTAH. 
In a report on “‘Natural Gas near Salt Lake City, Utah,” by 
G. B. Richardson,!*? is an analysis of the gas collected at the 
wells, 500 to 600 feet deep, in 1894, and analyzed by Prof. J. 
T. Kingsbury and others: 
TABLE No. 25. SALT LAKE CITY GAS. 
Methane isin cae eens ee Le eee OR 
Hithane-' > skys eee ee Ce eee Sie 
With ylene~. ices Gyege orients syorare ee tdereks Pete socoe reere ee 0 
CAarbomAnonoxidtete eon OO ne iL 
Carbonrdioxidwss oc eee a 0 
Hydrogen Sek oats pk rereitba te steruersaoteuiebne earns 16 
NitrOGen so iic.5 sce c easter aoe e histo e chee ea tomer a ee tg 
(05:41 604 0) ser ae ERS hei A Oey PRRPOLS ORGS cir Cc oioiniG 0 
Yoen fon fooll iene oor) 
100.0 
In commenting on the somewhat remarkable figures of this 
analysis, F. C. Phillips!* asserts that the hydrogen determina- 
tion must be in error. He describes a very delicate method 
and apparatus by which he tested this gas thoroughly for hy- 
drogen. None was found to be present. 
COLORADO. 
Few analyses are available of gases occurring in Colorado. 
Neither of the ones which we have found published are of 
combustible gases. Their interest lies rather in their high per- 
centage of nitrogen, which is of importance in relation to the 
Dexter, Kan., and the Princeton, IIl., gases. 
Harry A. Lee!* describes a gas which issues in great quan- 
tity from a highly brecciated portion of a great fault fissure- 
vein, in the Happy Thought mine, near Creede, Colo. The 
gas is lighter than air, seeking the upper portion of drifts, and 
is more abundant at times of low barometric pressure, disap- 
pearing almost completely when the pressure is high. The out- 
flow or inflow through openings in the breasts of drifts is at 
times sufficiently powerful to be distinctly audible and to blow 
the flame of a candle nearly horizontal. An analysis by W. F. 
Edwards showed oxygen, 3.92 per cent.; nitrogen, 96.08 per 
cent. 
No statement is made as to whether the concentration of 
152. Bull. No. 260, U.S. Geol. Surv., p. 481. 1904. 
153. Proc. Eng. Soc. of West. Pa. 13, 453. 
154. Proc. Colo. Sci. Soc., 7, 163-188. 
